@@ -50,11 +50,11 @@  | 
                                                    ||
| 50 | 50 | */  | 
                                                        
| 51 | 51 | public function withEqualPayments(int $a, int $p, int $n, float $i): float  | 
                                                        
| 52 | 52 |      { | 
                                                        
| 53 | -        $fx = function ($i) use ($a, $p, $n) { | 
                                                        |
| 53 | +        $fx = function($i) use ($a, $p, $n) { | 
                                                        |
| 54 | 54 | return $p - $p * pow(1 + $i, -1 * $n) - $i * $a;  | 
                                                        
| 55 | 55 | };  | 
                                                        
| 56 | 56 | |
| 57 | -        $fdx = function ($i) use ($a, $p, $n) { | 
                                                        |
| 57 | +        $fdx = function($i) use ($a, $p, $n) { | 
                                                        |
| 58 | 58 | return $n * $p * pow(1 + $i, -1 * $n - 1) - $a;  | 
                                                        
| 59 | 59 | };  | 
                                                        
| 60 | 60 | |
@@ -15,11 +15,11 @@  | 
                                                    ||
| 15 | 15 | $p = 291;  | 
                                                        
| 16 | 16 | $n = 48;  | 
                                                        
| 17 | 17 | |
| 18 | -        $fx = function ($i) use ($a, $p, $n) { | 
                                                        |
| 18 | +        $fx = function($i) use ($a, $p, $n) { | 
                                                        |
| 19 | 19 | return $p - $p * pow(1 + $i, -1 * $n) - $i * $a;  | 
                                                        
| 20 | 20 | };  | 
                                                        
| 21 | 21 | |
| 22 | -        $fdx = function ($i) use ($a, $p, $n) { | 
                                                        |
| 22 | +        $fdx = function($i) use ($a, $p, $n) { | 
                                                        |
| 23 | 23 | return $n * $p * pow(1 + $i, -1 * $n - 1) - $a;  | 
                                                        
| 24 | 24 | };  | 
                                                        
| 25 | 25 | |